If you still have problems because the jig/guider is too narrow (because your 3D printer cannot print the large version), try this patch set, because it is now elongated to 34 rows of 20 patches in a row (with 5 dummy patches to fill up the target up to 680 patches in total = 34x20). It takes longer to scan, but it should solve the problem of your current jig not able to reach from white begin patch (paper white) towards the other end and stops on a colored patch throwing an error that is only reads 24 of the 25 expected patches.